204609 has 8 divisors (see below), whose sum is σ = 274912. Its totient is φ = 135360.

The previous prime is 204601. The next prime is 204613. The reversal of 204609 is 906402.

204609 is nontrivially palindromic in base 12.

204609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204609 - 2³ = 204601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 864.

It is an arithmetic number, because the mean of its divisors is an integer number (34364).

2²⁰⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

204609 is a deficient number, since it is larger than the sum of its proper divisors (70303).

204609 is a wasteful number, since it uses less digits than its factorization.

204609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 204609 is about 452.3372635545. The cubic root of 204609 is about 58.9261740596.

The spelling of 204609 in words is "two hundred four thousand, six hundred nine".